r/EngineBuilding • u/Accurate-Ad-6545 • 1d ago

Is it normal

So I rebuilt my engine and then once I got it in and started it sat for another 3 months due to transmission issues and all together the car has been sitting for about a year with a full tank and when I parked it after a short test drive it had white smoke coming from the exhaust and I was wondering if this is normal for a while after a rebuild or maybe it’s from the fuel sitting soo long? Or is it something going wrong? If anyone could help that would be great thank you

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u/powdydoody 1d ago

A little bit of white smoke could just be condensation burning off which is normal.

  1. Is it a large white cloud of continous smoke?

  2. Are you seeing coolant loss?

A yes to either of those answers could be an improperly installed head gasket/ coolant leaking into a combustion chamber.

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u/Accurate-Ad-6545 1d ago

It’s continuous but dissipates quickly and I haven’t ran it long enough to tell if there is coolant loss

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u/powdydoody 1d ago

Probably just condensation burning off is my guess. Run it through your typical motor rebuild break in process and just keep a close eye on coolant levels and go from there

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